CN211871474U

CN211871474U - Hydrocyclone for separating sediment deposited in biochemical pool

Info

Publication number: CN211871474U
Application number: CN201922183955.6U
Authority: CN
Inventors: 赵晓东; 王鹏鹞; 周国亚
Original assignee: Penyao Enviromental Protection Co Ltd
Current assignee: Penyao Enviromental Protection Co Ltd
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-11-06
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses a hydrocyclone for biochemical pond deposit silt separation, including drum section and circular cone section, drum section inner wall is equipped with a plurality of cutting fins, cutting fins is downward along outer whirl direction slope, the last a plurality of through-holes that are equipped with of cutting fins. The utility model discloses an innovation point lies in the utility model discloses in through increase the cutting fin at drum section inner wall, when making outer whirl be close the section of thick bamboo wall, utilize the cutting fin to force to open the activated sludge floc, realize the separation to the interior sand grain of activated sludge floc. The sand amount carried in the overflow mixed liquid and the activated sludge amount of the underflow mixed liquid are reduced, and the separation efficiency is improved.

Description

Hydrocyclone for separating sediment deposited in biochemical pool

Technical Field

The utility model relates to a hydrocyclone field especially relates to a hydrocyclone that is used for biochemical pond deposit silt separation.

Background

Under the condition of low carbon source of inlet water, in order to ensure sufficient organic carbon source for biological nitrogen and phosphorus removal, a primary sedimentation tank is usually cancelled or an operation mode exceeding the primary sedimentation tank is adopted in many sewage plants, and with the development of sewage treatment process, an oxidation ditch and SBR process cancel the primary sedimentation tank and are replaced by an aeration grit chamber or a rotational flow grit chamber. Therefore, the tiny silt (< 200 μm) originally removed in the primary sedimentation tank directly enters the biochemical tank. After the tiny silt enters the biochemical tank, the silt with smaller diameter is easy to suspend in the sludge mixed liquid, part of the silt is discharged along with the rest, and the silt with diameter more than 100 mu m is easy to precipitate at the bottom of the biochemical tank, so that a large amount of tank capacity is occupied, and the sewage treatment efficiency is reduced; the aeration fan is easy to enter the aerator after being stopped, so that the aerator is damaged; the bottom silt is easy to harden, which affects the aeration effect.

Hydrocyclones are well-established separation devices commonly used for solid-liquid, solid-gas, and liquid-liquid separations. The structure of the device is that a hollow cylinder is arranged at the upper part, and an inverted cone communicated with the cylinder is arranged at the lower part, so that the upper part and the lower part form a working cylinder body of the hydrocyclone. The principle is that a mixture enters a cylinder through a feed port at a certain speed along the tangential direction of the cylinder, and performs top-down rotary motion in the cylinder to form an external rotational flow, and particles with higher density are thrown to a cylinder wall and move downwards along the cylinder wall by utilizing the density difference of different components in the mixture to reach the bottom of a cone body and are discharged from a bottom flow port; after the components with lower density move downwards and enter the vertebral body, the rotating diameter is gradually reduced, and finally the components are converged on the axis to form an upward internal rotational flow which is discharged through the top overflow port. The hydrocyclone can be used for separating sediment deposited in the biochemical tank, heavier sand grains are discharged along with underflow, and lighter activated sludge is discharged back into the biochemical tank along with overflow.

The sediment deposited in the biochemical tank mainly comprises fine sand with the diameter of 100-200 mu m, and as the activated sludge in the biochemical tank is of a flocculent structure, a large part of sand grains can be wrapped in an activated sludge flocculent body with low density and overflow to the biochemical tank along with the hydraulic cyclone, so that the sediment separation effect is poor. Therefore, the hydrocyclone is used for solving the key technical problems in the separation process of sediment and silt in a biochemical pool: (1) the separation efficiency is improved; (2) in the separation process, the wrapping structure of activated sludge floc and sand grains is broken, and the sand content in the overflow mixture and the activated sludge content in the underflow mixture are reduced. The existing hydrocyclones cannot meet the above requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hydrocyclone for biochemical pond deposit silt separation.

The utility model discloses an innovation point lies in the utility model discloses in through increase the cutting fin at drum section inner wall, when making outer whirl be close the section of thick bamboo wall, utilize the cutting fin to force to open the activated sludge floc, realize the separation to the interior sand grain of activated sludge floc. The sand amount carried in the overflow mixed liquid and the activated sludge amount of the underflow mixed liquid are reduced, and the separation efficiency is improved.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that: the utility model provides a hydrocyclone for biochemical pond deposit silt separation, includes cylinder section and circular cone section, cylinder section inner wall is equipped with a plurality of cutting fins, the cutting fin is downward along outer whirl direction slope, be equipped with a plurality of through-holes on the cutting fin.

Further, the inclination angle of the cutting fin is 10 °. Sludge is not easy to deposit on the cutting fins.

Furthermore, a plurality of groups of first lugs are arranged on the inner wall of the cylinder section, more than two second lugs are arranged on the cutting fin, each group of first lugs corresponds to the corresponding second lugs on the cutting fin, a first threaded hole is formed in each first lug, a second threaded hole corresponding to the first threaded hole is formed in each second lug, and the cutting fin and the first lugs are connected through the first threaded hole and the second threaded hole by screw nuts. The movable connection can adjust the density of the cutting fins according to the condition of sediment mixed liquor.

Furthermore, the first bump is divided into a plurality of layers, the distance between every two adjacent layers is equal, and each layer is arranged at equal intervals along the circumference of the inner wall of the cylindrical section.

Furthermore, the cutting fins are divided into a plurality of layers, and the distance between every two adjacent layers is equal.

Further, each layer of cutting fins is arranged along the circumference of the inner wall of the cylindrical section at equal intervals.

Furthermore, a screen plate is arranged above the cutting fins, a plurality of insertion thorns inserted into the through holes are arranged on the screen plate, and the screen plate is connected with the cutting fins through a plurality of springs. After the activated sludge flocs impact, the screen plate shakes, and the stabs are inserted into the through holes to stir, so that the through holes are not blocked.

The utility model has the advantages that: the utility model discloses an increase the cutting fin at drum section inner wall, when making outer whirl be close section of thick bamboo wall, utilize the cutting fin to force to open the activated sludge floc, realize the separation to the interior sand grain of activated sludge floc. The sand amount carried in the overflow mixed liquid and the activated sludge amount of the underflow mixed liquid are reduced, and the separation efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of embodiment 1.

Fig. 2 is a schematic structural view of a cut fin.

FIG. 3 is a cross-sectional view of a cut fin and mesh sheet.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example 1: as shown in fig. 1, 2 and 3, the hydrocyclone for separating sediment deposited in a biochemical pool comprises a cylinder section 1 and a cone section 2, wherein a plurality of cutting fins 3 are arranged on the inner wall of the cylinder section 1, the cutting fins 3 are inclined downwards along the direction of the outer rotational flow, the inclination angle of the cutting fins 3 is 10 degrees, and a plurality of through holes 4 are formed in the cutting fins 3. A screen plate 7 is arranged above the cutting fins 3, a plurality of inserting thorns 9 inserted into the through holes 4 are arranged on the screen plate 7, and the screen plate 7 is connected with the cutting fins 3 through a plurality of springs 8. The inner wall of the cylinder section 1 is provided with a plurality of groups of first lugs 5, the cutting fins 3 are provided with more than two second lugs 6, each group of first lugs 5 corresponds to the plurality of second lugs 6 on the cutting fins 3, each first lug 5 is provided with a threaded hole, each second lug 6 is provided with a second threaded hole corresponding to the first threaded hole, and the screw nut is used for connecting the cutting fins 3 with the first lugs 5 through the first threaded holes and the second threaded holes. The first bump 5 is divided into a plurality of layers, the distance between two adjacent layers is equal, and each layer is arranged at equal intervals along the circumference of the inner wall of the cylinder section 1. The cutting fins 3 are divided into a plurality of layers, the distance between every two adjacent layers is equal, and the cutting fins 3 on each layer are arranged at equal intervals along the circumference of the inner wall of the cylindrical section.

When in work: the sediment silt mixed liquid enters the hydrocyclone through the feeding pipe 10 at a certain flow velocity, and does top-to-bottom rotary motion in the cylinder section 1 to form an outer rotational flow, particles with larger density are thrown to the cylinder wall by utilizing the density difference of different components in the mixture, and in the process, the cutting fins 3 break up activated sludge flocs carried in the outer rotational flow to release sand grains in the flocs, and the sand grains move downwards along the cylinder wall and reach the bottom of the conical section 2 to be discharged from the bottom flow port 11; the activated sludge has low density, and after moving downwards and entering the conical section 2, the rotating diameter is gradually reduced, and finally the activated sludge is converged on the axis to form an upward internal rotational flow and is discharged through the top overflow pipe 12. When cutting fin 3 is broken up the activated sludge floc that smugglies in will outer whirl, although cutting fin 3 inclines downwards along outer whirl direction slope, nevertheless because mud has viscidity, can glue on cutting fin 3, prevent sand grain gliding, so set up some through-holes on cutting fin 3, make sand grain drop from through-hole department, through-hole 4 also exists by activated sludge floc jam's possibility, so through setting up otter board 7, otter board 7 and cutting fin 3 pass through spring coupling, otter board 7 produces the shake after the activated sludge floc striking, insert thorn 9 and mix in the through-hole, make the through-hole not blockked up.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. The utility model provides a hydrocyclone for biochemical pond deposit silt separation, includes cylinder section and circular cone section, its characterized in that, cylinder section inner wall is equipped with a plurality of cutting fins, cutting fins is downward along outer whirl direction slope, the last a plurality of through-holes that are equipped with of cutting fin.

2. The hydrocyclone for separation of sediment from biochemical ponds according to claim 1, wherein the cutting fin is inclined at an angle of 10 °.

3. The hydrocyclone for separating sediment deposited in a biochemical pond according to claim 1, wherein the inner wall of the cylinder section is provided with a plurality of sets of the first protruding blocks, the cutting fins are provided with more than two second protruding blocks, each set of the first protruding blocks corresponds to the plurality of the second protruding blocks on the cutting fins, the first protruding blocks are provided with the first threaded holes, the second protruding blocks are provided with the second threaded holes corresponding to the first threaded holes, and the screw nuts connect the cutting fins and the first protruding blocks through the first threaded holes and the second threaded holes.

4. The hydrocyclone for separating sediment deposited in a biochemical pond according to claim 3, wherein the first bump is divided into a plurality of layers, the adjacent two layers are equally spaced, and each layer is equally spaced along the circumference of the inner wall of the cylindrical section.

5. The hydrocyclone for separating sediment from mud in a biochemical pond according to claim 4, wherein the cutting fin is divided into a plurality of layers, and the adjacent layers are spaced at equal intervals.

6. The hydrocyclone for separating sediment from mud in a biochemical pond according to claim 5, wherein each layer of cutting fins is arranged at equal intervals along the circumference of the inner wall of the cylindrical section.

7. The hydrocyclone for separating sediment from mud in a biochemical pond according to claim 1, wherein a screen plate is disposed above the cutting fin, the screen plate is provided with a plurality of insertion thorns inserted into the through holes, and the screen plate and the cutting fin are connected by a plurality of springs.